Explore Scientific produced the world's first nitrogen-purged waterproof eyepieces with the 100° Series. The nitrogen-purged and waterproof feature of these eyepieces protects the internal elements from contaminents.

20mm 100° Series Nitrogen-Purged Waterproof Eyepiece These 20mm eyepieces have a 100° Apparent Field Of View and the body of the eyepiece is Nitrogen-purged and waterproof preserving the internal elements to remain as pristine as the day they were...

Explore Scientific 9mm 100° Series Argon-Purged Waterproof Eyepiece This 9mm eyepiece has a 100° Apparent Field Of View and the body of the eyepiece is Argon-purged and waterproof preserving the internal elements to remain as pristine as the day...

14mm 100° Series Argon-Purged Waterproof Eyepiece These eyepieces are the world's first Argon-purged waterproof eyepiece with a 100° Apparent Field for astronomy. The body of the eyepiece is Argon-purged and waterproof preserving the internal...

Explore Scientific 120 Degree Series 9mm Argon Purged Eyepiece 2" EP12009-01 This deep sky eyepiece is not only the first of it's kind for astronomy, it produces a highly corrected field across the 120 degree apparent field. The views of...